This summary of the video was created by an AI. It might contain some inaccuracies.
00:00:00 – 00:10:17
The video focuses on the urgent repair of a Lenovo ThinkPad T14 laptop that was not responding to the power button. The technician initially suspected an issue with the I/O chip but decided to perform basic troubleshooting steps first, including resetting the BIOS by unplugging and shorting the BIOS battery. This process involved resetting the EC (Embedded Controller) chip, which ultimately resolved the issue, allowing the laptop to power on and boot to Windows 11. Throughout the repair, the technician highlighted the importance of checking default settings before assuming hardware failure and identified critical power supplies and voltages within the device. The video concludes with the technician's satisfaction in fixing the laptop and a reminder to like and subscribe.
00:00:00
In this segment, the technician discusses an urgent repair job on a Lenovo ThinkPad T14 laptop, which the customer needs completed urgently. The customer agreed to pay £150 if the repair is done within the same day, or £100 otherwise. The issue with the laptop is that it does not respond to the power button, which only flashes but does nothing. The technician suspects the I/O chip is not reading the power button.
They proceed to open the laptop, noting that it appears to have never been opened before. Upon opening, the technician describes the internal components, including the CPU, power supplies, and memory chips, speculating that one of the memory chips might be the BIOS chip. The technician decides to start with basic troubleshooting steps, such as unplugging the main battery and the BIOS battery and then shorting the BIOS battery.
00:03:00
In this part of the video, the speaker is resetting the EC chip and forcing the AC chip to reload the BIOS, which loads the default settings. After reconnecting the BIOS battery and the main battery, pressing the power button causes the EC chip to read the power input, and the laptop begins to power on. Initially, there is no display, but after connecting the charger, the CPU heats up and a display appears, indicating the laptop is functioning and booting to Windows. The speaker concludes that the laptop issue was easily resolved by resetting the laptop, highlighting the importance of ensuring thorough checks before assuming a hardware failure.
00:06:00
In this part of the video, the speaker explains the process of resetting a laptop’s BIOS by interacting with the EC (Embedded Controller) chip, which loads the BIOS. The BIOS can be modified through the EC chip, and if there’s an issue, removing the BIOS battery causes the EC chip to revert to the default BIOS settings. They dealt with a damaged BIOS image within the EC chip, and resetting it resolved the issue, allowing the laptop to start. The segment ends with the speaker confirming that the laptop runs Windows 11, checking voltages, and preparing to close the video.
00:09:00
In this part of the video, the speaker discusses various power supplies and voltages found in the device being repaired. They mention specific measurements, such as 1.8 volts and 3.3 volts for the BIOS chip. The speaker notes that the CPU power supplies are located under the heatsink and also identifies a small 5-volt power supply. They provide guidance for repairing similar laptops by highlighting the important voltages. The segment concludes with the speaker expressing satisfaction with fixing the device and ending the video with customary thanks and a reminder to like and subscribe.